Wilbue goodwin



' (Ho Model.)

W. GOODWIN, GarpentersGa-ge.

Patented July 20,1880.

NITED STATES PATENT OFFICE.

WILBUR GOODWIN, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND DAVIDHUSTON, OF SAME PLACE.

CARPENTERS GAGE.

SPECIFICATION forming part of Letters Patent No. 230,127, dated July 20,1880.

Application filed April 21, 1880.

To all whom it may concern:

Be it known that I, WILBUR GOODWIN, of Boston, in the county of Suffolkand State of Massachusetts, have invented an Improved Garpenters Gage,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, making part ofspecification, in which Figure l. is a perspective view of a carpen- IOters gage constructed in accordance with my invention. Fig. 2 is aperspective view of the opposite side of the same. Fig. 3 is alongitudinal section through the center of the same. Fig. 4 is atransverse vertical section on the line as m of Fig. 3; Fig. 5, detailin perspective.

My invention has for its object to providea carpenters gage which, inaddition to its usual functions, will describe or cut a circle, therebyenabling me to dispense with the ordinary compass or dividers commonlyused; and my invention consists in providing the sliding head with amarking-point or cutter provided with a head inclosed beneath a metalplate, which can be set by adjusting the position of the head upon thestock or handle at any desired distance from the point of a pinprojecting transversely from the enlarged end of the stock and securedby a longitudinally-arranged setscrew, which serves as a center aroundwhich the tool can be moved to describe or cutacircle. In the saiddrawings, A represents the stock or handle of the gage, which isprovided, as usual, with a sliding head, B, having a clamping-screw, O,and at one edge a rabbet, a, which 3 5 tits over the edge of a boardwhen the gage is used in the ordinary manner, to make an indented lineparallel therewith and at any desired distance therefrom by means of theflattened marking-point I) at the end of the stock 0 A, which latter isprovided on one side with a scale, 0, to facilitate the setting of thesliding head B at any required distance from the end of the stock. Fromthe. side of the sliding head B opposite to that containing the clamp- 45 ing-screw 0 projects a flattened or doubleedged point or cutter, 0,provided with a head,

a, and passing through a plate, 6, screwed to the sliding head, therebysecuring said cutter (No model.)

0. From the end of the stock A, on the same side,projects a conicalpoint, f, the points f and b being formed at opposite ends of a pin, D,which slides transversely through an aperture in the end of the stock,and is held firmly in place therein by a clamping-screw, h, passingthrough a metallic plate, o, secured to the end of the stock, it beingnecessary that said screw it shall be longitudinally arranged, so as notto interfere with the use of the tool as an ordinary carpenters gage,the pin D being preferably fiattened on one side to afford a betterhearing for the end of the screw h, and by means of this constructionthe pin D may be adjusted and clamped so that both of its pointed endsI) and fwill project from opposite sides of the stock A, as seen in Fig.3, or so that one only of the points will project, as may be desired.

When it is desired to strike a circle the conical point fis pressed intothe wood, and the tool is then grasped and moved around this point f asa center, the cutting or marking point 0 being at the same time pressedinto the wood so as to mark a circle thereon, as seen at k,.Fig. 2.

I am aware that instruments have heretofore 7 5 been made wherein onefixed projecting point has been combined with a moving head bearinganother point or cutter to draw or cut in circular lines, and hence Imake no claim to such a combination of devices, broadly but,

Having thus described by invention, what I claim as new, and desire tosecure by Letters Patent, is-

The stock A, having a head, I, transverse adjustable cutter f b, andlongitudinal setscrew h, in combination with the sliding head E,provided with a metal plate, 0, inclosing and securing a cutting-point,0, provided with a head, 0, all constructed, arranged, and operated asset forth. o

Witness my hand this 19th day of April,

WILBUR GOODWIN. In presence of- P. E. TESOHEMAGHIER, W. J. CAMBRIDGE.

